Driving mechanism for the moving parts of automatic and semi-automatic machine-tools.



A. BECHLER.

DRWlNG MECHANISM FOR THE MOVlNG PARTS OF AUTQMATlC AND SE APFLICA'HON man omzz. 1914. 1,137,1$Q, Patented @1227, 1915.

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THE NORRIS PETERS Co. FHOTC-LITHO. WASHINGTON. D. C

- A. BECHLER. DRIVING MECHANISM FOR THE MOVING PARTS OF AUTOMATIC AND SEMI-AUTOMAHC MACHINE TOOLS.

APPLICATION FILED 05022. 1914. 1,137,180, Patented Apr. 27, 191.5.

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TINTTED STATES PATENT @FFTQE.

ANDRE BECI-ILER, OF MOUTIER, SWITZERLAND.

DRIVING MECHANISM FOR THE MOVING PARTS 0]? AUTOMATIC AND SEMI-AUTOMATIC MACHINE-TOOLS.

Application filed December 22, 1914.

To all whom it may concern Be it known that I, ANDRE 'BEcHLnR, a

citizen of the Swiss Republic, and residing .automatic and semi-automatic machine tools for the manipulation of wood, metal or the like, to operate the automatically moving machine parts, such as slides, spindles, chucks and the likeby means of cams and the like. In order to adapt machines of this type to manipulate blanks of diflerent size and shape it is necessary to have at disposal for each automatically operated member, several interchangeable cams of dissimilar profile in order to be able to vary the stroke of the corresponding machine part. It is quite evident that machines of this class in which several tools are employed, such as for instance in automatic machines, are made relatively too inexpensive on account of the number of the necessary accessories.

1 My invention has for its object to provide a driving mechanism for the moving parts of automatic and semi-automatic machine tools, in which interchangeable cams are entirely dispensed with.

According to my invention each automatically operated part of the machine is operated, by the intermediary of suitable motion-transmitting members, by means of stops which are arranged adjustably upon a stop drum to which there is imparted on the one hand a straight line reciprocating motion and on the other hand a displacementindependent of the reciprocating motion, in such a manner that after each reciprocation of the stop drum another group of stops is brought into the working position.

In the accompanying drawings are shown apparatus constructed in accordance with my invention as applied to an automatic lathe.

Figure 1 is a side view of the machine, certain parts being omitted in order to more clearly show theoperation of the machine.

Specification of Letters Patent.

Patented Apr. 27, 1915.

Serial No. 878,530.

Figs. 2 and 3 show corresponding front and rear views, while Fig. 4: shows diagrammatically the driving mechanism for the stop drums.

Cylindrical stop drums b, c, d are keyed upon a shaft a which is movable in the axial direction, each of said stop drums carrying a number of sliding pieces 6 distributed upon the whole cylindrical surface of the stop drums and arranged movable in longitudinal grooves. Each slide piece 6 can be displaced in its groove by means of an adjusting screw 6 and is provided with a number of screwed holes 9 into which are screwed set screws h which serve as stops.

Each of the stop drums b, 0, cl is intended to operate a movable part of the machine. For this purpose a lever 7c is arranged tangential to the stop drum b, the fulcrum of said lever being secured to the frame 2'. The free end of this lever is jointed to a link Z which is again jointed to the lower end of a lever 11. pivoted at n and connected at m to a part of the head stock 9. A v

striker p is secured by means of a nut 0 to the lever 70 so that when the shaft (2/. with the stop drums is moved axially, one of the screws h strikes against the striker 79 and imparts to the lever 70 a certain angular movement. The movement of the lever is is transmitted to the lever 92 and from thence to the head stock 9 which is connected in a suitable manner with the lever n. In a similar manner the spindle s is moved axially by the stop drum d, the stops of'which act upon the lever t; the latter is mounted rigidly upon the shaft a which carries at its other end an arm '0 whose free end is provided with a projection to which engages in a circular recess 00 of the driving wheel y. The spindle .9 to which the tool, for instance spiral drill, is secured, receives its rotary movement from the wheel 1, while its toand-fro movement is imparted to it from the stop drum d through the intermediary of levers t and c.

Fig. 3 shows another part of the mechanism, the object of this mechanism being to impart to the tool 2' the necessary to-and-fro movement from the stop drum 0. The tool is secured to a slide 2 which is moved to-and-fro by means of a spindle 3. Upon this spindle is rigidly secured a small toothed wheel 4 which engages with a toothed sector 5 which forms the end of one arm of a two armed lever rotatable at 6. The other arm 7 of this lever engages, by means of a projection, in a slot 8 of a vertical slide 9 which is put into motion by means of the stop drum 0 through the levers 10 and 11. The shaft a in addition to its axial movement also executes a periodically rotary movement. The drive for this shaft is shown diagrammatically in Fig. 4. A disk 12 which is keyed rigidly upon the shaft aengages in a cam groove 13 o'fa cam drum 14. The latter is rigidly keyed on a shaft 15 and connected with a worm wheel 16 which receives its drive from a worm 17 Upon the shaft a there is further mounted a toothed wheel 18 which drives the shaft a by means of a key 19, which latter however permits of the axial'movement of the shaft 0; independent of the wheel 18. V A projection 20 secured uponjthe shaft 15 engages in the tooth of the wheel 18 on each rotation of the shaft 15 thus rotating said wheel one tooth farther. The drive of the shaft a could of course be effected in any other suitable manner.

The method of working the device is as follows :When the machine is put into motion the shaft 15 and the roller 14 are rotated by means of the worm 17. The cam groove 13 causes the axial movement of the shaft a together with the stop drum 6, c, d mounted thereon. It is evident that if the stops it have been adjusted so that for instance only the striker p of the arm t is in the path of one of the stops, only the spindle s will be actuated upon the axial movement of the shaft 0;, while the head stock Q and the slide 2 remain at rest. The forward movement of the shaft on is effected during thefirst half rotation of the cam drum 14, while during the second half rotation of the roller the shaft a moves back into its original position, the spindle s is consequently moved into its original position by the action of a spring 21 which could of course be replaced by a stop mounted on the stop drum d, which would come into action upon the return'movement of the shaft a. When this roller 14 has effected a complete revolution the projection 20 rotates the wheel 18, the shaft a and the stop drums. By this means the stops of one of the drums c or 6 come into working position so that on the next rotation of the shaft 14 either the slide 2 or the head stock q comes into action.

vI generally construct the machine in such a manner that the different automatically moved parts are actuated one after the other but two or more of these parts could be operated simultaneously. Any number of movable parts may be operated in the manner described and instead of the stop drums being arranged on cylindrical drums they can be arranged in any other suitable manner.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. Driving mechanism for the moving parts of automatic and semi-automatic machine tools, comprising a tool supporting member, a stop supporting member independent thereof, stops mounted onsaid stop supporting member, means for imparting to said stop-suppoitingm'ember astraight-line reciprocating motion, and means for imparting to said stop-supporting member a motion, independentof said straight line reciprocating motion, for the purpose of bringing another stop into the working position. r

2. Driving mechanism for the moving parts of automatic and semi-automatic machine tools,. comprising a stop-supporting member, stops mounted thereon, means for imparting to said'stop-supporting member 1 a straight-line reciprocating motion, and

means for imparting to said stop-supporting.

member, 'a motion independent of said s'tralght-line reciprocating motion for the purpose of bringing another series of stops,

into the working position and means for 1I'n-.

parting the movement of said stops to the moving parts to be actuated.

3. Driving 'mechanism for the moving parts of automatic and semi-automatic machine tools, comprising a stop-supporting drum, stops mounted thereon, means for 1mparting to said stop-supporting member a straightline reciprocating motion, and means for imparting to said stop-supporting member, a motion independent of said straight-line reciprocating motion for the.

purpose of bringing another series'of stops into the working position and means for imparting the movement of said stops. to the moving parts to be actuated, adjusting screws for adjusting the position of the stops on the supporting member, a shaft movable. in the axial direction, said stopsupporting drum being rigidly mounted thereon.

4. Driving mechanism for the moving parts of automatic and semi-automatic machine tools, comprising a stop-supporting drum, stops mounted thereon, means for imparting to said stop-supporting member a straight-line reciprocating motion, and means for imparting to said stop-supporting member, a motioninde'p'endent of said straight-line reciprocating motion for the purpose of bringing another Series of stops into the working position and means for imparting the movement of said stops to the moving parts to be actuated, adjusting screws for adjusting the position of the In testimony whereof I have signed my stops on the supporting member, a shaft name to this specification in the presence of movable in the axial direction, a plurality tWo subscribing Witnesses.

, of stop-supporting drums being rigidly ANDRE BECHLER.

" mounted thereon, each of said drums being Witnesses:

adapted to actuate one of the moving parts ARNOLD ZUBER, to be actuated. FRIDA SALADIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

